Cub PTO direction

reb-in-pa · Aug 26, 2013

I'm mostly a Ford guy, so please forgive me if the answer to my question is common knowledge in the red tractor crowd -- I'm enjoying a newly acquired Cub, but I'd like to give it a job driving a portable generator during outages. Is there a way to reverse the spin of the PTO shaft?

Thanks.

Ray

farmallboy15 · Aug 26, 2013

You could run a belt on a pulley and then mount the generator on which ever side of the driven pulley that makes it go in the right direction.

ericlb · Aug 26, 2013

i dont think so, the cub pto runs at engine rpm, and in the opisit direction of "normal' unless you can rig a belt to spin the generator the other direction there would be no way to reverse its direction using a direct drive shaft

Anonymous-0 · Aug 26, 2013

An outfit called Hub City used to make a gearbox that bolted to the PTO housing on a Cub. It would reverse the direction AND reduce the speed by about a 3-to-1 ratio.

In the '60's, they were a lot more common...and $75-$100 would buy one. Last one I saw for sale anywhere was in the $900-$1000 range.

Dan Robertson · Aug 26, 2013

This is how I run this 5000 watt. I really think this generator can be run either direction. I have since this picture put a V-belt pulley on the right angle gear box.
Dan Robertson

gene bender · Aug 26, 2013

The Cub wont run a large generator but you could run one off the belt pulley by replacing the flat pulley with one that takes a V-Belt that way you will get enough RPMs to run a generator.

reb-in-pa · Aug 27, 2013

Gene --

I'm a little confused. Everything else I've read indicates that the Cub would have too high rpm because the PTO runs at engine speed, rated at 1800 rpm. The Hub City reverser that used to be available changed the direction and reduced rpm's 2.73:1.

And, do you assert that the Cub won't run a "large" generator because it lacks the power? My generator is a 12Kw, and the Cub was rated new at 8.8 hp, I believe.

Thanks.

Ray

mkirsch · Aug 27, 2013

12KW is approximately 16HP.

Power transfer is not 100% efficient, so you actually need closer to 25HP to run a 12KW generator at full capacity.

The Cub will not have enough power to run a 12KW generator at even 1/2 capacity.

reb-in-pa · Aug 28, 2013

mkirsch --

Thanks. You no doubt just saved me a lot of time and money chasing down a blind alley. I have a Super A and a BN as well, but their PTOs are odd, too, and their HPs are also inadequate. Sounds like I should be hooking up one of the Fords -- or maybe the old Allis WD. . .

Thanks again.

Ray

Tramway Guy · Aug 28, 2013

Rotation shouldn't make any difference to an generator.

mkirsch · Aug 28, 2013

(quoted from post at 04:37:00 08/28/13) Rotation shouldn't make any difference to an generator.

Maybe not, but a PTO generator has been turning in one direction all its life so the gears and brushes are worn in in that direction.

The A and BN must be early models with the 1-1/8" PTO. Those can be used with a simple adapter.

Craig45 · Aug 28, 2013

That's a nice looking rig Dan. Looks like you put a lot of work into it.

IH fan · Aug 28, 2013

All this generator talk reminds me I haven't started mine for a while. Probably should do that soon so it will be ready if we have an ice storm this winter.
If you have a WD Allis, that should have the HP to run it at or near capacity and not be too hard on fuel.

Cub PTO direction

reb-in-pa

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